If Windows 11 starts restarting after you enable Secure Boot, the right fix depends on what appears on screen. A BitLocker recovery prompt, a firmware “Secure Boot violation,” and a Windows startup failure are different problems. Note the exact message first; then follow the matching recovery path below.
Identify where startup is failing
Microsoft’s Secure Boot troubleshooting guide, published March 19, 2026, covers Windows 11 versions 23H2, 24H2, 25H2, and 26H1. It describes several causes that can coincide with enabling Secure Boot, including boot-order changes, certificate servicing, and firmware trust-database problems. Timing alone does not prove that Secure Boot itself caused the restart loop. Microsoft’s Secure Boot troubleshooting guide is the best place to match a specific firmware message to a certificate-related cause.
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- BitLocker recovery screen: Windows is asking for the BitLocker recovery key to unlock the encrypted drive. This is not the same as a firmware Secure Boot violation.
- “Secure Boot violation” before Windows loads: Firmware may be rejecting the Windows boot manager or may no longer have the certificate needed to trust it.
- Windows logo, Automatic Repair, or repeated restart: Treat this as a general Windows startup failure unless the screen or timing points to a firmware problem.
Also note whether you can enter UEFI settings or reach the Windows Recovery Environment (WinRE). The exact menu names vary by device, so consult the manufacturer’s instructions rather than guessing.
If BitLocker asks for a recovery key
Find and enter the recovery key for the encrypted device before trying recovery options that need access to its drive. Microsoft notes that most WinRE recovery options on an encrypted device require this key. A single prompt after a Secure Boot update may be transient; repeated prompts warrant checking the boot path.
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Check whether network boot comes before Windows
A PXE or network-boot entry ahead of Windows Boot Manager can cause recurring BitLocker recovery prompts: the network and local boot paths can measure different signing authorities. Check the device’s boot order in UEFI and put Windows Boot Manager first. If network boot is not needed, disable PXE. If it is required, Microsoft advises using a Windows boot loader signed with the 2023 certificate. Follow your device maker’s guidance for the relevant settings. Microsoft explains the recurring BitLocker recovery and PXE scenario.
If Windows reaches WinRE but cannot start
For a Windows logo followed by Automatic Repair or another startup failure, try Startup Repair from WinRE. Microsoft’s path is:
- Open Troubleshoot > Advanced options > Startup Repair.
- Select Restart and follow the on-screen prompts.
Startup Repair targets common Windows startup issues, including missing or damaged system files and corrupted boot configuration data. It is not a repair for missing firmware trust certificates or other Secure Boot database problems. On an encrypted device, have the BitLocker recovery key available. Microsoft’s Startup Repair instructions describe this option.
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When WinRE will not open
You can use Windows installation media created on a working PC. Boot the affected PC from that media, then select Repair my PC to reach recovery options. The media is a way to access Windows recovery tools; it is not itself a Secure Boot repair. Microsoft’s Windows Recovery Environment guidance covers the installation-media route and recovery options.
Quick Machine Recovery availability
On Windows 11 version 24H2 or later, Quick Machine Recovery may be available if enabled. Microsoft says it can detect repeated startup failures and check Windows Update for a fix in applicable outage scenarios. It is not a guaranteed fix for Secure Boot or firmware trust problems. Microsoft’s recovery-options guide describes recovery choices for a PC that will not start.
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If firmware shows a Secure Boot violation
A failure before Windows loads needs a firmware-specific diagnosis. Pay particular attention to whether the problem began immediately after resetting Secure Boot settings to firmware defaults, or immediately after certificate servicing.
After resetting Secure Boot settings
On a device already using a Windows UEFI CA 2023-signed boot manager, resetting Secure Boot settings may remove the certificate needed to trust that boot manager. Microsoft describes a specialized recovery procedure using SecureBootRecovery.efi from a FAT32 USB drive, followed by a device firmware update. This is not an ordinary Startup Repair task: use Microsoft’s current instructions for the exact scenario and the device maker’s firmware guidance. Microsoft’s guide explains the certificate-loss recovery path.
Immediately after certificate servicing
Microsoft also documents a possible firmware bug that overwrites Secure Boot database entries instead of appending them. Check the device manufacturer’s support page for a firmware correction. If a firmware reset does not restore boot, seek model-specific OEM help; repeating generic Windows repairs will not necessarily restore firmware trust databases. Microsoft’s Secure Boot troubleshooting guide describes this failure mode and OEM escalation.
Should you temporarily disable Secure Boot?
Microsoft says, “In some cases, you may need to temporarily disable Secure Boot to address an issue,” and recommends enabling it again once the issue is resolved. Microsoft’s Windows 11 Secure Boot guidance explains the setting. Only change it if you can identify the relevant UEFI option and understand the device maker’s instructions; menu labels and behavior vary by model. Treat disabling Secure Boot as a temporary troubleshooting measure, not as a universal fix for every restart loop.
A safe order for troubleshooting
- Write down the exact screen or error and whether the PC can reach UEFI settings, BitLocker recovery, or WinRE.
- If BitLocker appears, retrieve and enter the recovery key before attempting drive-based recovery.
- If BitLocker prompts recur, check whether PXE/network boot comes before Windows Boot Manager and adjust the order or PXE configuration as appropriate.
- If Windows reaches WinRE, try Startup Repair. If WinRE is inaccessible, use installation media and select Repair my PC.
- If firmware reports a Secure Boot violation, match the timing to a settings reset or certificate update and follow the corresponding Microsoft and OEM guidance.
- If you temporarily disabled Secure Boot, re-enable it after resolving the underlying issue, following the device maker’s instructions.
Avoid repeated, random firmware resets or generic boot-record commands as a default response. They do not address every firmware trust-database failure and may complicate diagnosis.
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